Which revision best corrects the faulty parallelism in the sentence? 'She enjoys hiking in the mountains, swimming in the lake, and to explore new cities.'

The correct answer to the question "Which revision best corrects the faulty parallelism in the sentence? 'She enjoys hiking in the mountains, swimming in the lake, and to explore new cities.'" is Option A: She enjoys hiking in the mountains, swimming in the lake, and exploring new cities..

The other options — B) She enjoys hiking in the mountains, to swim in the lake, and exploring new cities., C) She enjoys to hike in the mountains, swimming in the lake, and to explore new cities., D) She enjoys hiking, swimming, and she explores new cities. — are incorrect for this ACT Exam Prep question. As explained above: For parallel structure in a list, all items should be in the same grammatical form. Since the first two items are gerunds ('hiking,' 'swimming'), the third item should also be a gerund ('exploring').